package com.bdqn.t330.ch11.shiro;


import at.pollux.thymeleaf.shiro.dialect.ShiroDialect;
import com.bdqn.t330.ch11.entity.Right;
import com.bdqn.t330.ch11.servcie.RoleService;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.crazycake.shiro.RedisCacheManager;
import org.crazycake.shiro.RedisManager;
import org.crazycake.shiro.RedisSessionDAO;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.annotation.Resource;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

@Configuration
public class ShiroConfig {

    @Value("${spring.redis.host}")
    private String host;
    @Value("${spring.redis.port}")
    private int port;
    // @Value("${spring.redis.password}")
    // private String password;
    @Value("${spring.redis.timeout}")
    private int timeout;

    @Resource
    RoleService roleService;

    @Bean
    public MyShiroRealm myShiroRealm() { //自定义 Realm
        MyShiroRealm shiroRealm = new MyShiroRealm();
        // 设置启用缓存，并设置缓存名称
        shiroRealm.setCachingEnabled(true);
        shiroRealm.setAuthorizationCachingEnabled(true);
        shiroRealm.setAuthorizationCacheName("authorizationCache");
        // 设置凭证( 密码) 匹配器
        shiroRealm.setCredentialsMatcher(hashedCredentialsMatcher());
        return shiroRealm;
    }

    @Bean
    public DefaultWebSecurityManager securityManager() { //安全管理器 SecurityManager
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        //注入 Realm
        securityManager.setRealm(myShiroRealm());

        // 注入缓存管理器
        securityManager.setCacheManager(cacheManager());
        // 注入会话管理器
        securityManager.setSessionManager(sessionManager());
        return securityManager;
    }

    //启动tomcat就会执行,因为要初始化securityManager,securityManager需要初始化自定义realm,也就是我们的MyShiroRealm
    //
    @Bean
    public ShiroFilterFactoryBean shiroFilterFactory(SecurityManager securityManager) {//Shiro 过滤器：权限验证
        ShiroFilterFactoryBean shiroFilterFactory = new ShiroFilterFactoryBean();
        //注入 SecurityManager
        shiroFilterFactory.setSecurityManager(securityManager);
        //权限验证：使用 Filter 控制资源(URL)的访问

        //设置资源访问的规则
        //权限验证：使用 Filter 控制资源(URL)的访问
        //shiroFilterFactory.setLoginUrl("/dologin");
        shiroFilterFactory.setSuccessUrl("/main");
        shiroFilterFactory.setUnauthorizedUrl("/403"); //没有权限跳转 403 页面
        Map<String, String> filterChainDefinitionMap = new LinkedHashMap<String, String>();//必须使用 LinkedHashMap(有序集合)
        //必须使用 LinkedHashMap(有序集合)
        //配置可以匿名访问的资源(URL)：静态资源
        filterChainDefinitionMap.put("/css/**", "anon");
        filterChainDefinitionMap.put("/fonts/**", "anon");
        filterChainDefinitionMap.put("/images/**", "anon");
        filterChainDefinitionMap.put("/js/**", "anon");
        filterChainDefinitionMap.put("/localcss/**", "anon");
        filterChainDefinitionMap.put("/localjs/**", "anon");
        filterChainDefinitionMap.put("/dologin", "anon");
        filterChainDefinitionMap.put("/login", "anon");
        filterChainDefinitionMap.put("/logout", "anon");
        //filterChainDefinitionMap.put("/logout", "logout");//注销过滤器，自动注销

        //filterChainDefinitionMap.put("/user/getlist", "perms[用户列表]");
        //filterChainDefinitionMap.put("/user/toadd", "perms[用户添加]");
        //filterChainDefinitionMap.put("/user/edit", "perms[用户编辑]");
        //filterChainDefinitionMap.put("/user/del", "perms[用户删除]");

        // 动态授权
        List<Right> rights = roleService.findAllRights();
        for (Right right : rights) {
            if (right.getRightUrl() != null && !right.getRightUrl().trim().equals("")) {
                filterChainDefinitionMap.put(right.getRightUrl(), "perms[" + right.getRightCode() + "]");
            }
        }


        //配置认证访问：其他资源(URL)必须认证通过才能访问
        filterChainDefinitionMap.put("/**", "authc"); //必须放在过滤器链的最后面
        shiroFilterFactory.setFilterChainDefinitionMap(filterChainDefinitionMap);
        return shiroFilterFactory;
    }

    @Bean(name = "shiroDialect")
    public ShiroDialect shiroDialect() {//thymeleaf 页面上使用 shiro 标签
        return new ShiroDialect();
    }

    /**
     * 开启 Shiro 注解(如@RequiresRoles,@RequiresPermissions),
     * 需借助 SpringAOP 扫描使用 Shiro 注解的类,并在必要时进行安全逻辑验证
     * 配置以下两个 bean(DefaultAdvisorAutoProxyCreator 和AuthorizationAttributeSourceAdvisor)
     */
    @Bean
    public DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator() {
        DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator = new DefaultAdvisorAutoProxyCreator();
        advisorAutoProxyCreator.setProxyTargetClass(true);
        return advisorAutoProxyCreator;
    }

    /**
     * 开启 aop 注解支持
     */
    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
        authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
        return authorizationAttributeSourceAdvisor;
    }

    public RedisManager redisManager() {
        RedisManager redisManager = new RedisManager();
        redisManager.setHost(host);
        redisManager.setPort(port);
        //redisManager.setPassword(password);
        redisManager.setTimeout(timeout);
        return redisManager;
    }

    public RedisCacheManager cacheManager() {
        RedisCacheManager cacheManager = new RedisCacheManager();
        cacheManager.setRedisManager(redisManager());
        // 缓存名称
        cacheManager.setPrincipalIdFieldName("usrName");
        // 缓存有效时间
        cacheManager.setExpire(1800);
        return cacheManager;
    }

    // 会话操作
    public RedisSessionDAO redisSessionDAO() {
        RedisSessionDAO sessionDAO = new RedisSessionDAO();
        sessionDAO.setRedisManager(redisManager());
        return sessionDAO;
    }

    // 会话管理
    public DefaultWebSessionManager sessionManager() {
        DefaultWebSessionManager sessionManager = new DefaultWebSessionManager();

        sessionManager.setSessionDAO(redisSessionDAO());
        return sessionManager;
    }

    @Bean
    public HashedCredentialsMatcher hashedCredentialsMatcher() {
        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
        //  使用 md5  算法进行加密
        hashedCredentialsMatcher.setHashAlgorithmName("md5");
        //  设置散列次数：  意为加密几次
        hashedCredentialsMatcher.setHashIterations(2);
        return hashedCredentialsMatcher;
    }
}
